Increase the cache size of fontconfig queries.

ui/gfx/font_render_params_linux.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/font_render_params.h"
 
 #include <fontconfig/fontconfig.h>
 
 #include "base/command_line.h"
 #include "base/containers/mru_cache.h"
@@ skipping 13 matching lines @@
 
 namespace {
 
 #if defined(OS_CHROMEOS)
 // A device scale factor for an internal display (if any)
 // that is used to determine if subpixel positioning should be used.
 float device_scale_factor_for_internal_display = 1.0f;
 #endif
 
 // Number of recent GetFontRenderParams() results to cache.
-const size_t kCacheSize = 64;
+const size_t kCacheSize = 256;
 
 // Cached result from a call to GetFontRenderParams().
 struct QueryResult {
   QueryResult(const FontRenderParams& params, const std::string& family)
       : params(params),
         family(family) {
   }
   ~QueryResult() {}
 
   FontRenderParams params;
@@ skipping 239 matching lines @@
 float GetFontRenderParamsDeviceScaleFactor() {
   return device_scale_factor_for_internal_display;
 }
 
 void SetFontRenderParamsDeviceScaleFactor(float device_scale_factor) {
   device_scale_factor_for_internal_display = device_scale_factor;
 }
 #endif
 
 }  // namespace gfx